GitHub improves pull request performance for large changes

GitHub has overhauled its pull request review interface, migrating to a new React-based system to enhance performance, particularly for large code changes. The engineering team focused on optimizing rendering, reducing interaction latency, and managing memory consumption to address issues where JavaScript heaps could exceed 1 GB and DOM node counts reached hundreds of thousands, leading to sluggish user experiences. This initiative aims to maintain a fast and responsive environment for developers, even when dealing with pull requests spanning thousands of files and millions of lines of code, ensuring a smoother workflow for its vast user base.